Who Is Number One?
| MPAA Rating: | NR |
| Genre: | Mystery |
| Country: | United States |
| Directed By: | William Bertram |
| Written By: | Anna Katharine Green |
| Cast: | Bruce Smith, Corinne Grant, Ethel Ritchie, Cullen Landis, Neil Hardin, Kathleen Clifford, Gordon Sackville |
| In Theaters: | Oct 29, 1917 |
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